California's tougher-than-usual climate change policy might become more stringent before long. Assemblywoman Autumn Burke tells the Associate Press that she's introducing a bill requiring that car manufacturers sell at least 15 percent zero-emissions free vehicles within a decade. Companies operating in the state already have to hit yearly emissions targets and get credits for sales, but this would require that they embrace electric or hydrogen fuel cell cars in a big way -- not just one or two novelty models. And if they don't sell enough eco-friendly cars, they'd have to either pay a fine to the state or pay rivals that meet the targets. Yes, they might inadvertently help the competition.